/*
 * The MIT License
 * Copyright (c) 2012 kc4.org
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package org.kc4.sso.auth.section.provider;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.Serializable;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.arnx.jsonic.JSON;

import org.kc4.sso.auth.SSOContextParameters;
import org.kc4.sso.auth.SSOProviderInitParameters;
import org.kc4.sso.auth.section.InterruptedSectionException;
import org.kc4.sso.auth.section.ModelSection;
import org.kc4.sso.crypto.SSOSymmetricCipher;
import org.kc4.sso.session.SSOSession;

/**
 * @author yoichi kikuchi
 *
 */
public class AcceptAuthorizationTokenSection extends ModelSection {

	/**
	 * インスタンスを生成します。
	 *
	 * @param request リクエスト。
	 * @param response レスポンス。
	 */
	public AcceptAuthorizationTokenSection(HttpServletRequest request, HttpServletResponse response) {

		super(request, response);
	}

	@Override
	public void execute() throws InterruptedSectionException {

		/*
		 * 認証トークンリクエスト
		 *
		 * => 該当エントリから JSON 形式の文字列を生成し、暗号化して text/plain で出力
		 */
		String authorizationToken = (String) this.getRequest().getAttribute(SSOContextParameters.getInstance().getNamingOfAuthorizationToken());
		if (authorizationToken != null && !authorizationToken.isEmpty()) {

			SSOSession sso = SSOProviderInitParameters
				.getInstance().getSsoSessionStore().get(authorizationToken);

			if (sso != null) {

				Serializable userObject = sso.getUserObject();
				String jsonContent = JSON.encode(userObject);

				SSOSymmetricCipher cipher =
					new SSOSymmetricCipher(sso.getCommonkey());
				String encrypted = cipher.encryptAsHex(jsonContent);

				this.getResponse().setContentType("text/plain");
				this.getResponse().setContentLength(encrypted.getBytes().length);
				try {

					PrintWriter w = this.getResponse().getWriter();
					w.print(encrypted);
					w.close();
					throw new InterruptedSectionException(false);
				}
				catch (IOException e) {

					throw new IllegalStateException(e);
				}
			}

			this.sendError(HttpServletResponse.SC_FORBIDDEN);
			throw new InterruptedSectionException(true);
		}
	}
}
